On 27 Jun 2014, at 10:53, Klaipedaville on Google <klaipedavi...@gmail.com> wrote:
> I have a quick question / request for clarification. I’ll try to be concise. > > My ISP has a generic rDNS. For clarity I’ll say that it is defined as > follows, "Generic rDNS means that a DNS query on the IP address resolves to > something like: 123-45-67-8.your.isp.com. The opposite of generic rDNS is a > "unique reverse pointer" which is usually something like > mail.your-domain.com." > > Now my postfix always warns me due to this generic rDNS of my ISP. > > Postfix says, "hostname verification errors in FCrDNS: > Does not resolve to address > 123.45.67.8 123-45-67-8.my.isp.com” > > Any free FCrDNS online service also shows and says the same thing, that is > that rDNS is not forward confirmed or PTR is generic. The IP address is > static. > > Postfix is working OK but this warning is simply always there as I have no > control over my ISP. Would appreciate any suggestions / advices / pointers on > how do I fix it? Many thanks in advance! First off, for the best assistance, post the actual log entries for the warning, instead of a generic description. Too much information tends to get lost if people 'translate' :-) And if you do use domain names in your examples, make sure they are the actual values, or something appropriate for example use, like 'example.com'. As documented here; http://tools.ietf.org/html/rfc2606#page-2 As for a fix, check whether your ISP supports setting the reverse DNS for your IP address. This may be a feature that comes with a 'business' type account, or they may not support it at all. If it's not supported, the general advice is to send outgoing mail via the SMTP servers provided by your ISP, to avoid issues with delivery. Mvg, Joni
